import axios from 'axios'
import config from '@/config'
// import Cookies from 'js-cookie'
import router from '@/router'
import { saveAs } from 'file-saver'
import errorCode from '@/utils/errorCode'
import cache from '@/plugins/cache'
import { MessageBox, Message, Loading } from 'element-ui'
import { tansParams, blobValidate } from '@/utils/commonTwo'

let downloadLoadingInstance
// 是否显示重新登录
export let isRelogin = { show: false }
const baseUrl = process.env.VUE_APP_BASE_API
/*process.env.NODE_ENV === "development"
    ? config.baseUrl.dev
    : config.baseUrl.pro;*/
// 是否显示重新登录
// export let isRelogin = { show: false };

axios.defaults.headers['Content-Type'] = 'application/json;charset=utf-8'
// 创建axios实例
const service = axios.create({
    // axios中请求配置有baseURL选项，表示请求URL公共部分
    baseURL: baseUrl,
    // 超时
    timeout: 10000
})

// request拦截器
service.interceptors.request.use(
    function (config) {
        if (config.url === '/login') {
            return config
        }
        // if (Cookies.get('token') === 'undefined') {
        if (cache.session.getJSON('token') === 'undefined') {
            router.replace({
                path: '/'
            })
        }
        // get请求映射params参数
        if (config.method === 'get' && config.params) {
            let url = config.url + '?' + tansParams(config.params)
            url = url.slice(0, -1)
            config.params = {}
            config.url = url
        }
        // 是否需要防止数据重复提交
        const isRepeatSubmit = (config.headers || {}).repeatSubmit === false
        if (!isRepeatSubmit && (config.method === 'post' || config.method === 'put' || config.method === 'delete')) {
            const requestObj = {
                url: config.url,
                data: typeof config.data === 'object' ? JSON.stringify(config.data) : config.data,
                time: new Date().getTime()
            }
            const sessionObj = cache.session.getJSON('sessionObj')
            if (sessionObj === undefined || sessionObj === null || sessionObj === '') {
                cache.session.setJSON('sessionObj', requestObj)
            } else {
                const s_url = sessionObj.url // 请求地址
                const s_data = sessionObj.data // 请求数据
                const s_time = sessionObj.time // 请求时间
                const interval = 1000 // 间隔时间(ms)，小于此时间视为重复提交
                if (s_data === requestObj.data && requestObj.time - s_time < interval && s_url === requestObj.url) {
                    const message = '数据正在处理，请勿重复提交'
                    console.warn(`[${s_url}]: ` + message)
                    return Promise.reject(new Error(message))
                } else {
                    cache.session.setJSON('sessionObj', requestObj)
                }
            }
        }
        // config.headers['token'] = Cookies.get('token')
        config.headers['token'] = cache.session.getJSON('token')
        return config
    },
    function (error) {
        return Promise.reject(error)
    }
)

// 响应拦截器
service.interceptors.response.use(
    function (res) {
        // 二进制数据则直接返回,文件下载时传入的是二进制文件
        if (res.request.responseType === 'blob' || res.request.responseType === 'arraybuffer') {
            return res.data
        }
        // 未设置状态码则默认成功状态
        const code = res.data.code || 200
        // 获取错误信息
        const msg = errorCode[code] || res.data.msg || errorCode['default']
        if (code === 401) {
            if (!isRelogin.show) {
                isRelogin.show = true
                MessageBox.confirm('登录状态已过期，您可以继续留在该页面，或者重新登录', '系统提示', {
                    confirmButtonText: '重新登录',
                    cancelButtonText: '取消',
                    type: 'warning'
                })
                    .then(() => {
                        isRelogin.show = false
                        router.replace({
                            path: '/'
                        })
                    })
                    .catch(() => {
                        isRelogin.show = false
                    })
            }
            return Promise.reject('无效的会话，或者会话已过期，请重新登录。')
        }
        return res
    },
    function (error) {
        return Promise.reject(error)
    }
)

// 通用下载方法
export function download(url, params, filename) {
    downloadLoadingInstance = Loading.service({
        text: '正在下载数据，请稍候',
        spinner: 'el-icon-loading',
        background: 'rgba(0, 0, 0, 0.7)'
    })
    return service
        .post(url, params, {
            transformRequest: [
                (params) => {
                    return tansParams(params)
                }
            ],
            headers: {
                'Content-Type': 'application/x-www-form-urlencoded'
            },
            responseType: 'blob'
        })
        .then(async (data) => {
            const isLogin = await blobValidate(data)
            if (isLogin) {
                const blob = new Blob([data])
                saveAs(blob, filename)
            } else {
                const resText = await data.text()
                const rspObj = JSON.parse(resText)
                const errMsg = errorCode[rspObj.code] || rspObj.msg || errorCode['default']
                Message.error(errMsg)
            }
            downloadLoadingInstance.close()
        })
        .catch((r) => {
            console.error(r)
            Message.error('下载文件出现错误，请联系管理员！')
            downloadLoadingInstance.close()
        })
}

export default service

/*class HttpRequest {
  constructor(baseUrl) {
    this.baseUrl = baseUrl;
  }

  getInsideConfig() {
    const config = {
      baseUrl: this.baseUrl,
      header: {},
    };
    return config;
  }

  interceptors(instance) {
    // 添加请求拦截器
    instance.interceptors.request.use(
      function (config) {
        if (config.url === "/login") {
          return config;
        }
        if (Cookies.get("token") === "undefined") {
          router.replace({
            path: "/",
          });
        }
        config.headers["token"] = Cookies.get("token");
        return config;
      },
      function (error) {
        return Promise.reject(error);
      }
    );

    // 添加响应拦截器
    instance.interceptors.response.use(
      function (response) {
        return response;
      },
      function (error) {
        return Promise.reject(error);
      }
    );
  }
  request(options) {
    const instance = axios.create({
      baseURL: this.baseUrl,
    });
    options = { ...this.getInsideConfig(), ...options };
    this.interceptors(instance);
    return instance(options);
  }
}

export default new HttpRequest(baseUrl);*/
